20.

1943. Studies in the life history of the song sparrow. II. The
behavior of the song sparrow and other passerines. Trans.
Linn. Soc. N.Y., 6:328 pp.

1954. Problems of incubation periods in North American birds.
Condor, 56:173-197.

NOLAN, V.

1960. Breeding behavior of the Bell Vireo in southern Indiana.
Condor, 62:225-244.

PITELKA, F. A.

1959. Numbers, breeding schedule, and territoriality in
Pectoral Sandpipers of northern Alaska. Condor,
61:223-264.

PITELKA, F. A., and KOESTNER, E. J.

1942. Breeding behavior of Bell's Vireo in Illinois. Wilson
Bull., 54:97-106.

RIDGWAY, R.

1889. The ornithology of Illinois. Illinois State Nat. Hist.
Survey, 1: viii + 520 pp.

1904. The birds of North and Middle America. U.S. Nat. Mus.
Bull., 50, pt. 3; xx + 801 pp.

SKUTCH, A. F.

1957. The incubation patterns of birds. Ibis, 99:69-93.

SOUTHERN, W. E.

1958. Nesting of the Red-eyed Vireo in the Douglas Lake
Region, Michigan. The Jack-Pine Warbler, 36:105-130,
185-207.

SUTTON, G. M.

1949. Studies of the nesting birds of the Edwin S. George
Reserve. Part 1. The Vireos. Misc. Pub. Univ. Michigan
Mus. Zool., 74:5-36.

TOWNSEND, C. W.

1920. Supplement to the birds of Essex County, Massachusetts.
Mem. Nuttall Orn. Club, No. 5:196 pp.

TYLER, W. M.

1912. A vireo courtship. Bird Lore, 14:229-230.

VAN TYNE, J., and BERGER, A. J.

1959. Fundamentals of ornithology. John Wiley & Sons, Inc.,
New York. xi + 624 pp.

WETHERBEE, D. K.

1957. Natal plumages and downy pteryloses of passerine
birds of North America. Bull. Amer. Mus. Nat. Hist.,
113:5:339-436.

_Transmitted November 8, 1961._

29-1506

UNIVERSITY OF KANSAS PUBLICATIONS
MUSEUM OF NATURAL HISTORY

Institutional libraries interested in publications exchange may obtain
this series by addressing the Exchange Librarian, University of Kansas
Library, Lawrence, Kansas. Copies for individuals, persons working in
a particular field of study, may be obtained by addressing instead the
Museum of Natural History, University of Kansas, Lawrence, Kansas.
There is no provision for sale of this series by the University
Library, which meets